//    Copyright 2021 Cardinal
//
//    Licensed under the Apache License, Version 2.0 (the "License");
//    you may not use this file except in compliance with the License.
//    You may obtain a copy of the License at
//
//        http://www.apache.org/licenses/LICENSE-2.0
//
//    Unless required by applicable law or agreed to in writing, software
//    distributed under the License is distributed on an "AS IS" BASIS,
//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//    See the License for the specific language governing permissions and
//    limitations under the License.

import java.util.ArrayList;
import java.util.concurrent.CompletableFuture;
import java.util.stream.Collectors;

public class homework_2 {
    public static void main(String[] args) {
        var futures = new ArrayList<CompletableFuture<Integer>>();
        for (int i = 1; i < 100; i+=10) {
            final int j = i;
            futures.add(CompletableFuture.supplyAsync(()->{
                int k = j;
                for (int l = j + 1; l < j + 10; l++) {
                    k += l;
                }
                return k;
            }));
        }

        int result = futures.stream()
                            .collect(Collectors.summingInt(CompletableFuture::join));

        System.out.println("计算结果:" + result);
    }
}
